Hi,
What are the main function that may amend in attached example to work with
HackRF. Regards Junaid
#!/usr/bin/env python
#
# Copyright 2005,2007,2011 Free Software Foundation, Inc.
#
# This file is part of GNU Radio
#
# GNU Radio is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3, or (at your option)
# any later version.
#
# GNU Radio is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with GNU Radio; see the file COPYING. If not, write to
# the Free Software Foundation, Inc., 51 Franklin Street,
# Boston, MA 02110-1301, USA.
#
import math
import sys
import wx
from optparse import OptionParser
from gnuradio import gr, audio, uhd
from gnuradio import analog
from gnuradio import blocks
from gnuradio import filter
from gnuradio.eng_option import eng_option
from gnuradio.wxgui import stdgui2, fftsink2, scopesink2, slider, form
from numpy import convolve, array
#import os
#print "pid =", os.getpid()
#raw_input('Press Enter to continue: ')
# ////////////////////////////////////////////////////////////////////////
# Control Stuff
# ////////////////////////////////////////////////////////////////////////
class ptt_block(stdgui2.std_top_block):
def __init__(self, frame, panel, vbox, argv):
stdgui2.std_top_block.__init__ (self, frame, panel, vbox, argv)
self.frame = frame
self.space_bar_pressed = False
parser = OptionParser (option_class=eng_option)
parser.add_option("-a", "--args", type="string", default="",
help="UHD device address args [default=%default]")
parser.add_option("", "--spec", type="string", default=None,
help="Subdevice of UHD device where appropriate")
parser.add_option("-A", "--antenna", type="string", default=None,
help="select Rx Antenna where appropriate")
parser.add_option ("-f", "--freq", type="eng_float", default=442.1e6,
help="set Tx and Rx frequency to FREQ", metavar="FREQ")
parser.add_option ("-g", "--rx-gain", type="eng_float", default=None,
help="set rx gain [default=midpoint in dB]")
parser.add_option ("", "--tx-gain", type="eng_float", default=None,
help="set tx gain [default=midpoint in dB]")
parser.add_option("-I", "--audio-input", type="string", default="default",
help="pcm input device name. E.g., hw:0,0 or /dev/dsp")
parser.add_option("-O", "--audio-output", type="string", default="default",
help="pcm output device name. E.g., hw:0,0 or /dev/dsp")
parser.add_option ("-N", "--no-gui", action="store_true", default=False)
(options, args) = parser.parse_args ()
if len(args) != 0:
parser.print_help()
sys.exit(1)
if options.freq < 1e6:
options.freq *= 1e6
self.txpath = transmit_path(options.args, options.spec,
options.antenna, options.tx_gain,
options.audio_input)
self.rxpath = receive_path(options.args, options.spec,
options.antenna, options.rx_gain,
options.audio_output)
self.connect(self.txpath)
self.connect(self.rxpath)
self._build_gui(frame, panel, vbox, argv, options.no_gui)
self.set_transmit(False)
self.set_freq(options.freq)
self.set_rx_gain(self.rxpath.gain) # update gui
self.set_volume(self.rxpath.volume) # update gui
self.set_squelch(self.rxpath.threshold()) # update gui
def set_transmit(self, enabled):
self.txpath.set_enable(enabled)
self.rxpath.set_enable(not(enabled))
if enabled:
self.frame.SetStatusText ("Transmitter ON", 1)
else:
self.frame.SetStatusText ("Receiver ON", 1)
def set_rx_gain(self, gain):
self.myform['rx_gain'].set_value(gain) # update displayed value
self.rxpath.set_gain(gain)
def set_tx_gain(self, gain):
self.txpath.set_gain(gain)
def set_squelch(self, threshold):
self.rxpath.set_squelch(threshold)
self.myform['squelch'].set_value(self.rxpath.threshold())
def set_volume (self, vol):
self.rxpath.set_volume(vol)
self.myform['volume'].set_value(self.rxpath.volume)
#self.update_status_bar ()
def set_freq(self, freq):
r1 = self.txpath.set_freq(freq)
r2 = self.rxpath.set_freq(freq)
#print "txpath.set_freq =", r1
#print "rxpath.set_freq =", r2
if r1 and r2:
self.myform['freq'].set_value(freq) # update displayed value
return r1 and r2
def _build_gui(self, frame, panel, vbox, argv, no_gui):
def _form_set_freq(kv):
return self.set_freq(kv['freq'])
self.panel = panel
# FIXME This REALLY needs to be replaced with a hand-crafted button
# that sends both button down and button up events
hbox = wx.BoxSizer(wx.HORIZONTAL)
hbox.Add((10,0), 1)
self.status_msg = wx.StaticText(panel, -1, "Press Space Bar to Transmit")
of = self.status_msg.GetFont()
self.status_msg.SetFont(wx.Font(15, of.GetFamily(), of.GetStyle(), of.GetWeight()))
hbox.Add(self.status_msg, 0, wx.ALIGN_CENTER)
hbox.Add((10,0), 1)
vbox.Add(hbox, 0, wx.EXPAND | wx.ALIGN_CENTER)
panel.Bind(wx.EVT_KEY_DOWN, self._on_key_down)
panel.Bind(wx.EVT_KEY_UP, self._on_key_up)
panel.Bind(wx.EVT_KILL_FOCUS, self._on_kill_focus)
panel.SetFocus()
if 1 and not(no_gui):
rx_fft = fftsink2.fft_sink_c(panel, title="Rx Input", fft_size=512,
sample_rate=self.rxpath.if_rate,
ref_level=80, y_per_div=20)
self.connect (self.rxpath.u, rx_fft)
vbox.Add (rx_fft.win, 1, wx.EXPAND)
if 1 and not(no_gui):
rx_fft = fftsink2.fft_sink_c(panel, title="Post s/w Resampler",
fft_size=512, sample_rate=self.rxpath.quad_rate,
ref_level=80, y_per_div=20)
self.connect (self.rxpath.resamp, rx_fft)
vbox.Add (rx_fft.win, 1, wx.EXPAND)
if 0 and not(no_gui):
foo = scopesink2.scope_sink_f(panel, title="Squelch",
sample_rate=32000)
self.connect (self.rxpath.fmrx.div, (foo,0))
self.connect (self.rxpath.fmrx.gate, (foo,1))
self.connect (self.rxpath.fmrx.squelch_lpf, (foo,2))
vbox.Add (foo.win, 1, wx.EXPAND)
if 0 and not(no_gui):
tx_fft = fftsink2.fft_sink_c(panel, title="Tx Output",
fft_size=512, sample_rate=self.txpath.usrp_rate)
self.connect (self.txpath.amp, tx_fft)
vbox.Add (tx_fft.win, 1, wx.EXPAND)
# add control area at the bottom
self.myform = myform = form.form()
# first row
hbox = wx.BoxSizer(wx.HORIZONTAL)
hbox.Add((5,0), 0, 0)
myform['freq'] = form.float_field(
parent=panel, sizer=hbox, label="Freq", weight=1,
callback=myform.check_input_and_call(_form_set_freq, self._set_status_msg))
hbox.Add((5,0), 0, 0)
vbox.Add(hbox, 0, wx.EXPAND)
# second row
hbox = wx.BoxSizer(wx.HORIZONTAL)
myform['volume'] = \
form.quantized_slider_field(parent=self.panel, sizer=hbox, label="Volume",
weight=3, range=self.rxpath.volume_range(),
callback=self.set_volume)
hbox.Add((5,0), 0)
myform['squelch'] = \
form.quantized_slider_field(parent=self.panel, sizer=hbox, label="Squelch",
weight=3, range=self.rxpath.squelch_range(),
callback=self.set_squelch)
g = self.rxpath.u.get_gain_range()
hbox.Add((5,0), 0)
myform['rx_gain'] = \
form.quantized_slider_field(parent=self.panel, sizer=hbox, label="Rx Gain",
weight=3, range=(g.start(), g.stop(), g.step()),
callback=self.set_rx_gain)
hbox.Add((5,0), 0)
vbox.Add(hbox, 0, wx.EXPAND)
self._build_subpanel(vbox)
def _build_subpanel(self, vbox_arg):
# build a secondary information panel (sometimes hidden)
# FIXME figure out how to have this be a subpanel that is always
# created, but has its visibility controlled by foo.Show(True/False)
#if not(self.show_debug_info):
# return
panel = self.panel
vbox = vbox_arg
myform = self.myform
#panel = wx.Panel(self.panel, -1)
#vbox = wx.BoxSizer(wx.VERTICAL)
hbox = wx.BoxSizer(wx.HORIZONTAL)
hbox.Add((5,0), 0)
#myform['decim'] = form.static_float_field(
# parent=panel, sizer=hbox, label="Decim")
#hbox.Add((5,0), 1)
#myform['fs@usb'] = form.static_float_field(
# parent=panel, sizer=hbox, label="Fs@USB")
#hbox.Add((5,0), 1)
#myform['dbname'] = form.static_text_field(
# parent=panel, sizer=hbox)
hbox.Add((5,0), 0)
vbox.Add(hbox, 0, wx.EXPAND)
def _set_status_msg(self, msg, which=0):
self.frame.GetStatusBar().SetStatusText(msg, which)
def _on_key_down(self, evt):
# print "key_down:", evt.m_keyCode
if evt.m_keyCode == wx.WXK_SPACE and not(self.space_bar_pressed):
self.space_bar_pressed = True
self.set_transmit(True)
def _on_key_up(self, evt):
# print "key_up", evt.m_keyCode
if evt.m_keyCode == wx.WXK_SPACE:
self.space_bar_pressed = False
self.set_transmit(False)
def _on_kill_focus(self, evt):
# if we lose the keyboard focus, turn off the transmitter
self.space_bar_pressed = False
self.set_transmit(False)
# ////////////////////////////////////////////////////////////////////////
# Transmit Path
# ////////////////////////////////////////////////////////////////////////
class transmit_path(gr.hier_block2):
def __init__(self, args, spec, antenna, gain, audio_input):
gr.hier_block2.__init__(self, "transmit_path",
gr.io_signature(0, 0, 0), # Input signature
gr.io_signature(0, 0, 0)) # Output signature
self.u = uhd.usrp_sink(device_addr=args, stream_args=uhd.stream_args('fc32'))
# Set the subdevice spec
if(spec):
self.u.set_subdev_spec(spec, 0)
# Set the antenna
if(antenna):
self.u.set_antenna(antenna, 0)
self.if_rate = 320e3
self.audio_rate = 32e3
self.u.set_samp_rate(self.if_rate)
dev_rate = self.u.get_samp_rate()
self.audio_gain = 10
self.normal_gain = 32000
self.audio = audio.source(int(self.audio_rate), audio_input)
self.audio_amp = blocks.multiply_const_ff(self.audio_gain)
lpf = filter.firdes.low_pass(1, # gain
self.audio_rate, # sampling rate
3800, # low pass cutoff freq
300, # width of trans. band
filter.firdes.WIN_HANN) # filter type
hpf = filter.firdes.high_pass(1, # gain
self.audio_rate, # sampling rate
325, # low pass cutoff freq
50, # width of trans. band
filter.firdes.WIN_HANN) # filter type
audio_taps = convolve(array(lpf),array(hpf))
self.audio_filt = filter.fir_filter_fff(1,audio_taps)
self.pl = analog.ctcss_gen_f(self.audio_rate,123.0)
self.add_pl = blocks.add_ff()
self.connect(self.pl,(self.add_pl,1))
self.fmtx = analog.nbfm_tx(self.audio_rate, self.if_rate)
self.amp = blocks.multiply_const_cc (self.normal_gain)
rrate = dev_rate / self.if_rate
self.resamp = filter.pfb.arb_resampler_ccf(rrate)
self.connect(self.audio, self.audio_amp, self.audio_filt,
(self.add_pl,0), self.fmtx, self.amp,
self.resamp, self.u)
if gain is None:
# if no gain was specified, use the mid-point in dB
g = self.u.get_gain_range()
gain = float(g.start() + g.stop())/2.0
self.set_gain(gain)
self.set_enable(False)
def set_freq(self, target_freq):
"""
Set the center frequency we're interested in.
Args:
target_freq: frequency in Hz
@rypte: bool
"""
r = self.u.set_center_freq(target_freq)
if r:
return True
return False
def set_gain(self, gain):
self.gain = gain
self.u.set_gain(gain)
def set_enable(self, enable):
if enable:
self.amp.set_k (self.normal_gain)
else:
self.amp.set_k (0)
# ////////////////////////////////////////////////////////////////////////
# Receive Path
# ////////////////////////////////////////////////////////////////////////
class receive_path(gr.hier_block2):
def __init__(self, args, spec, antenna, gain, audio_output):
gr.hier_block2.__init__(self, "receive_path",
gr.io_signature(0, 0, 0), # Input signature
gr.io_signature(0, 0, 0)) # Output signature
self.u = uhd.usrp_source(device_addr=args,
io_type=uhd.io_type.COMPLEX_FLOAT32,
num_channels=1)
self.if_rate = 256e3
self.quad_rate = 64e3
self.audio_rate = 32e3
self.u.set_samp_rate(self.if_rate)
dev_rate = self.u.get_samp_rate()
# Create filter to get actual channel we want
nfilts = 32
chan_coeffs = filter.firdes.low_pass(nfilts, # gain
nfilts*dev_rate, # sampling rate
13e3, # low pass cutoff freq
4e3, # width of trans. band
filter.firdes.WIN_HANN) # filter type
rrate = self.quad_rate / dev_rate
self.resamp = filter.pfb.arb_resampler_ccf(rrate, chan_coeffs, nfilts)
# instantiate the guts of the single channel receiver
self.fmrx = analog.nbfm_rx(self.audio_rate, self.quad_rate)
# standard squelch block
self.squelch = analog.standard_squelch(self.audio_rate)
# audio gain / mute block
self._audio_gain = blocks.multiply_const_ff(1.0)
# sound card as final sink
audio_sink = audio.sink(int(self.audio_rate), audio_output)
# now wire it all together
self.connect(self.u, self.resamp, self.fmrx, self.squelch,
self._audio_gain, audio_sink)
if gain is None:
# if no gain was specified, use the mid-point in dB
g = self.u.get_gain_range()
gain = float(g.start() + g.stop())/2.0
self.enabled = True
self.set_gain(gain)
v = self.volume_range()
self.set_volume((v[0]+v[1])/2)
s = self.squelch_range()
self.set_squelch((s[0]+s[1])/2)
# Set the subdevice spec
if(spec):
self.u.set_subdev_spec(spec, 0)
# Set the antenna
if(antenna):
self.u.set_antenna(antenna, 0)
def volume_range(self):
return (-20.0, 0.0, 0.5)
def set_volume (self, vol):
g = self.volume_range()
self.volume = max(g[0], min(g[1], vol))
self._update_audio_gain()
def set_enable(self, enable):
self.enabled = enable
self._update_audio_gain()
def _update_audio_gain(self):
if self.enabled:
self._audio_gain.set_k(10**(self.volume/10))
else:
self._audio_gain.set_k(0)
def squelch_range(self):
return self.squelch.squelch_range()
def set_squelch(self, threshold):
print "SQL =", threshold
self.squelch.set_threshold(threshold)
def threshold(self):
return self.squelch.threshold()
def set_freq(self, target_freq):
"""
Set the center frequency we're interested in.
Args:
target_freq: frequency in Hz
@rypte: bool
"""
r = self.u.set_center_freq(target_freq)
if r:
return True
return False
def set_gain(self, gain):
self.gain = gain
self.u.set_gain(gain)
# ////////////////////////////////////////////////////////////////////////
# Main
# ////////////////////////////////////////////////////////////////////////
def main():
app = stdgui2.stdapp(ptt_block, "NBFM Push to Talk")
app.MainLoop()
if __name__ == '__main__':
main()
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